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Sauron [17]
3 years ago
14

What is 7n-20=9(4n+1) ????

Mathematics
2 answers:
SIZIF [17.4K]3 years ago
4 0
7n-20=9(4n+1)\ \ \ \ | omit\ the\ bracket\\\\
7n-20=36n+9\ \ \ | add\ 20\\\\
7n=36n+29\ \ \ | subtract\ 36n\\\\
-29n=29\ \ \ | divide\ by\ -29\\\\
n=-1\\\\Solution\ is\ n=-1.
Tresset [83]3 years ago
4 0
7n - 20 = 9(4n + 1) 
7n - 20 = 36n + 9
-7n - 20 = 36n - 7n + 9
-20 = 29n + 9
-20 - 9 = 29n - 9
-29= 29n 
29n = -29
n = -1

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An acute triangle had two sides measuring 8cm and 10 cm what is the best representation of the possible range of values for tge
katrin2010 [14]
The third side must be >2 and < 18

To test if a triangle is acute, right or obtuse:
1) Square all 3 sides
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if sum = side 3 squared it is a right triangle
if sum < side 3 squared it is an obtuse triangle

The shortest side 2 can be is "less than 2" so we'll say it is 2.00000001
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100
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8 0
3 years ago
Simplify: (-3y5)3 <br>-9y8 <br>-9y15<br> -27y8 <br>-27y15​
Amiraneli [1.4K]

Answer:

(-3y5)3

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Step-by-step explanation:

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6 0
3 years ago
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Fiesta28 [93]
The correct answer to your question is 20x+25
7 0
2 years ago
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6 0
2 years ago
What is the property of the equation 3x+5 - 5 = 20-5
Shalnov [3]

Answer:

x=5

Step-by-step explanation:

We simplify the equation to the form, which is simple to understand

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6 0
2 years ago
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